Speaker cabinet



FIG. 1 is a top plan view of a speaker cabinet, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a perspective view showing the side, front, and top of the speaker cabinet; and,

FIG. 4 is a perspective view showing the side, rear, and bottom of the speaker cabinet. 

The ornamental design for a speaker cabinet, as shown and described. 